Somin's not right. I got my car with two factory dead keys. Got a new key from the dealer, been working great since. 50'+ range. I drive it 40 min/day and do a lot of 10-15hr trips. Usually about 2 or 3 per month. Key is perfect. I'd say you probably need a new key. That's the most common failure, the battery inside dies off. Dealer even told me if you get more than 5yrs from a key you are lucky.